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A dry-cleaning solvent (molecular weight = 146.99 g/mol) that contains C, H, and Cl is suspected to be a cancer-causing agent. When a 0.124 g sample was studied by combustion analysis, 0.223 g of CO2 and 0.0301 g of H2O formed. How many moles of each of the following were in the original sample?
What is the molarity of an unknown acid if 40.5 ml of the acid can be titrated
Explain what would happen to the color of a dilute solution containing FeCl_4_^- if you added a solution containing silver ion, Ag^+. added concentrated HCl.
Technetium-99m is used for radioisotope-guided surgical biopsies of certain bone cancers. A patient must receive an injection of 28mCi of technetium-99m 6-12 hours before surgery.
use the appropriate standard reduction potentials to calculate the value of k at 25 degrees celcius for this reaction
kinetic energy of 7070 J/mol under certain conditions, what is the root mean square speed of F2(g) molecules under the same conditions?
A sample containing .221g Cl is dissolved in 50.0mL of water. How many moles of Cl ion are in the solution?
What is the dew point of a mixture of air and water vapor at 60°C and 1 atm in which the mole fraction of the water is 12%. The total pressure on the mixture is constant.
A polymer sample combines five different molecular-weight fractions, each of equal weight. The molecular weights of these fractions increase from 20,000 to 100,000 in increments of 20,000.
Starting with 2.70 x 10^22 atoms of Tl-206, calculate the number of such atoms left after 28.5 min.
Calculate the number of formula units of the compound and the number of each ion in 3.75 moles of AlCl3.
If 32.0 g CaC2 are consumed in this reaction, how many moles of H2O are needed?
50.0 ml of 2.00 m h2so4 react with 75.0 ml of 2.00m naoh. identify the limiting and excess reactants. how many grams of
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